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Phys. Rev. A 74, 012503 (2006) [9 pages]

Channel-coupling array theory for Coulomb three-body dynamics: Antiproton capture by hydrogen atoms

Nobuhiro Yamanaka1 and Atsushi Ichimura2
1Department of Physics, University of Tokyo, Tokyo 113-0033, Japan
2Institute of Space and Astronautical Science, JAXA, Sagamihara, Kanagawa 229-8510, Japan

Received 1 March 2006; published 11 July 2006

A theory of channel coupling array is developed for rearrangement reactions in Coulomb three-body systems. Inhomogeneous coupled differential equations for the three Faddeev components are derived and directly solved with the technique of complex rotation in the exterior region. This method is applied to slow antiproton collisions with hydrogen atoms. It is found for a collision energy of 6.8  eV that the antiproton is captured dominantly into protonium states with the principal quantum numbers around 40 and that the electron is released with energies around 2  eV. The electron velocity thereby obtained is much higher than the incident velocity of the antiproton. Time-dependent wave-packet propagation of the Faddeev components is also investigated to illustrate the peculiar dynamics.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.74.012503
DOI: 10.1103/PhysRevA.74.012503
PACS: 36.10.-k; 34.90.+q; 02.70.Bf
  • 36.10.-k
    Exotic atoms and molecules (containing mesons, muons, and other unusual particles)
  • 34.90.+q
    Other topics in atomic and molecular collision processes and interactions (restricted to new topics in section 34)
  • 02.70.Bf
    Finite-difference methods
  • YEAR: 2006
KEYWORDS: hadronic atoms, hydrogen neutral atoms, atom-atom collisions, isomerisation, differential equations

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